System and method for correcting higher order aberrations...

Details System and method for correcting higher order aberrations... System and method for correcting higher order aberrations...

A - Human Necessities

61

F

A61F 9/01 (2006.01)

Patent

CA 2750748

A method for correcting higher order aberrations in an eye requires Laser Induced Optical Breakdown (LIOB) of stromal tissue. In detail, the method identifies at least one volume of stromal tissue in the eye, with each volume defining a central axis parallel to the visual axis of the eye. Thereafter, a pulsed laser beam is focused to a focal spot in each volume of stromal tissue to cause LIOB of stromal tissue at the focal spot. Further, the focal spot is moved through the volume of stromal tissue to create a plurality of incisions centered about the respective central axis of the volume. As a result, a predetermined selective weakening of the stroma is caused for correction of the higher order aberration.

L'invention concerne un procédé de correction d'aberrations d'ordre supérieur dans un il, qui nécessite une disruption optique induite par laser (Laser Induced Optical Breakdown, LIOB) de tissu stromal. Plus précisément, le procédé identifie au moins un volume de tissu stromal de l'il, chaque volume définissant un axe de symétrie parallèle à l'axe visuel de l'il. Un faisceau laser pulsé est ensuite concentré en un point focal de chaque volume de tissu stromal pour provoquer une LIOB du tissu stromal au point focal. Le point focal est en outre déplacé à travers le volume de tissu stromal pour créer une pluralité d'incisions centrées autour de l'axe de symétrie respectif du volume. Il en résulte un affaiblissement sélectif prédéterminé du stroma en vue de la correction de l'aberration d'ordre supérieur.

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